Here are a couple of photos of watches that I scrimshawed a while ago for a watch maker in Martha's Vineyard. They are each hand scrimshawed on pre ban ivory and water buffalo horn faces. The maps aren't as elaborate as what most of you are doing here, but then, they are only 44mm in diameter.
http://i1048.photobucket.com/albums/s369/DarrelMorris/VineyardTimeMapWatch52_zps9e35710a.jpg